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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Why does estrus happen before ovulation?






2. 30 hours after estrus begins






3. What helps regulate spermatogenesis?






4. When are steers and heifers weaned from bottle feeding?






5. 45-60 days after breeding; re-breed as required






6. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat






7. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)






8. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






9. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






10. (LH) causes female's egg to break (her period)






11. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation






12. Sperm production






13. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






14. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge






15. 19-23 (21) days






16. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).






17. When are dairy cattle dehorned?






18. 4-6 days






19. (FSH) causes egg to mature in females






20. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.






21. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






22. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






23. Start of the reproductive tract for the female. located outside of the body






24. (male) pushes the testes upward toward the body for warmth or protection






25. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






26. Not under a timeline - cow can not be sold as steak






27. 16-20 hours






28. When are steers and heifers weaned from bottle feeding?






29. 30 hours after estrus begins






30. 2 month growth cycle. stored in the epididymis of the bull






31. Larger the cow - more milk is produced; smaller the cow - less milk is produced






32. 1. brain function - 2. blood flow - 3. willing female






33. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






34. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






35. Larger the cow - more milk is produced; smaller the cow - less milk is produced






36. (male) pushes the testes outward toward the legs for a cool-down off of the body






37. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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38. ~60 days before calving






39. Implies the amount of estrogen production






40. What makes the milk flow through the mammary glands?






41. 2 month growth cycle. stored in the epididymis of the bull






42. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)






43. Implies the amount of estrogen production






44. Superior genes are _______ to multiply






45. Luteolysis happens because of the ____________ hormone






46. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total






47. Animals which have many estrous periods per year (ex: cow - sow)






48. Milk is 15% ________ and 85% __________.






49. Male on one pin and female on other side






50. Days which have decreasing daylight hours

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